Answer:
c.ethnicity divided between more than one state.
Explanation:
Korea is an East Asian nation and is located on the southern Korean peninsular and shares one of the heavily metalized borders. And is divided into more than one state and southern and the western parts of the nations and they belong to the East Asian nations.Plus they have a number of the native southwestern Manchurian ethnic groups and lives in the north and south Korea and along with the ethnic minority of china and japan and the Philippines etc. As of the 2020, there are estimated more than 8.3 million ethnic Koreans population.Korea is best described as an ethnicity divided between more than one state, due to the presence of both North Korea and South Korea as separate sovereign entities with a shared Korean heritage ethnicity divided between more than one state. Hence the correct option is C.
The question 'Korea is a good example of a(n)...' asks us to classify Korea in terms of its political and ethnic organization. When we consider the modern geopolitical state of Korea, we find that it is divided into two separate sovereign states: North Korea and South Korea. Based on the provided options, the most accurate classification would be c. ethnicity divided between more than one state. This is because the Korean ethnicity is primarily split across two states, each with its own independent government, despite sharing a common cultural and historical heritage. The existence of North Korea and South Korea as separate entities also reflects historical division imposed by international forces rather than a natural evolution into two distinct nations.
An incident is geographically dispersed, and it is not feasible for the incident base to support the incident logistical needs. Assuming that you do not want to divide the incident in two separate incidents, what is another option for managing this incident?
Answer:
Establish a second Logistics Section reporting to a Deputy Incident Commander (Logistics).
Explanation:
Establishing a second Logistics Section reporting to a Deputy Incident Commander (Logistics) ensure adequate feasibility support to the incident logistics need.
This ensures that the most pressing needs are met, and that precious resources are used without duplication or waste. This is to establish planning and management functions for responding partners to work in a coordinated and systematic approach.
Which number on the map represents the Ganges River?
The Ganges River is running through the northern and northeastern parts of India, continuing in Bangladesh and ending its flow at the Bay of Bengal.
Explanation:
The Ganges River (Ganga) is one of the largest and most important rivers in India and South Asia as a whole. This river starts its flow very high in the western part of the Himalayas. Initially it moves toward southwest as it enters the northern part of India, then it makes a sharp turn toward southeast as it continues through northern India, flowing parallel with the river Yamuna with which it merges and they continue as one river.
After that the Ganges River makes a turn toward east and runs through the northeastern part of India. Later it makes a turn toward southeast as it enters Bangladesh and maintains the same direction until it ends its flow into the Bay of Bengal.
Answer:
the answer is two.
Explanation:
When marine geologists collects a core of undeformed ocean-floor sediment, they know that the youngest layer is on the top of the core and the oldest is at the bottom because of the principle of __.
Answer:
principle of superposition
Explanation:
Principle of superposition -
According to the principle of superposition , the positioning of the layer are in a manner that , the youngest layer is near to the surface of the crust , where as the oldest layer is deep inside from the surface of the crust , is referred to as principle of superposition .
This method enables to determine the age of the layers according to their placement from the crust .
Hence , from the given information of the question ,
The correct answer is principle of superposition .
Morphological and genetic comparisons group 30 species of snapping shrimp (genus Alpheus) into 15 pairs of closely related species. What is the best explanation for the fact that one member of each pair lives on the Atlantic side of the Isthmus of Panama, whereas the other member of each pair lives on the Pacific side
Answer:
species rose by allopatric speciation when Isthmus of Panama separated the ancestral species.
Explanation:
The causes of the morphological and the genetic comparison of the groups of 30 species can be explained by the part of the species that have an allopatric specialization. Suggest the mode of the specialization that occurs when the biological population of the same species becomes isolated with each other This prevents the interference of the gene flow. The isthmus of the Panama is a narrow strip of the lands and contains the countries of the Panama and was formed about 2.8 million years ago.On what type of land does primary succession first begin to occur
Explanation:
Barren rock from beneath a retreating glacier, or due to a volcanic eruption. Low-growing plants such as mosses, ferns, and lichens begin to colonize. Fast-growing grasses, flowering plants, and small shrubs begin to take root
The astronomical event that is now thought to have occurred some 65 million years ago, resulting in the death of a large fraction of all living species and leaving a layer of clay containing an enhanced concentration of a rare metal, iridium, in the geological record in rocks throughout Earth was a(n):
Answer:
Asteriod
Explanation:
The astronomical event called the K-T event (Cretaceous-Tertiary Mass Extinction event) that is now thought to have occurred some 65 million years ago, resulting in the death of a large fraction of all living species and leaving a layer of clay containing an enhanced concentration of a rare metal, iridium, in the geological record in rocks throughout Earth was an Asteroid.
This asteroid is thought to have been responsible for the death of the last of the dinosaurs and created a crater at the point of impact in the Yucatan region of Mexico. This crater is called the Chicxulub crater and has been age dated (by the 40Ar/39Ar method) at 65 million years.
It is said to be an 180-km diameter ring structure.
You are the mayor of Destiny, a small town with a population of 6,000. Destiny sits at sea level, and it’s western boundary faces the Gulf of Mexico. You know that global warming will cause sea waters to rise in the next 20 years, and you need ideas for keeping Destiny safe. So you announce a new contest at your next town meeting. Townspeople are asked to submit ideas for handling the rising ocean on a city website. Ideas that are supported by more than 1000 people will be considered as finalists in the contest. The winner of the contest will receive $5,000 and the opportunity to work with city planners to implement his or her idea.
Answer: Crowdstorming
Explanation:
This is an example of crowdstorming because you have asked the public to evaluate each other’s ideas, as well as posting new ideas. Crowdstorming involves generating new ideas, but not evaluating them, while crowdfunding involves asking the public for money to implement an idea.
An idea must be supported by more than approximately 16.75% of the population to be considered as a finalist. This is the percentage that is just over the threshold of 1000 supporters out of a population of 6000."
The town of Destiny has a population of 6000, and for an idea to be considered as a finalist in the contest, it needs to be supported by more than 1000 people. To find out what percentage of the population this represents, we divide the number of required supporters by the total population:
[tex]\[ \frac{1001}{6000} \][/tex]
This fraction represents the minimum proportion of the population needed to support an idea for it to qualify as a finalist. To simplify this fraction, we can divide both the numerator and the denominator by their greatest common divisor (GCD). However, since we are looking for a percentage greater than this fraction, we can directly convert it to a percentage by multiplying by 100:
[tex]\[ \frac{1001}{6000} \times 100 = \frac{1001}{60} \][/tex]
Now, to simplify this fraction, we can divide both the numerator and the denominator by 60 (since 1001 is not divisible by 60, we can consider the next whole number that is, which is 120, and 1001 is approximately 1201, which is divisible by 60):
[tex]\[ \frac{1001}{60} \approx \frac{1201}{60} = \frac{1201}{60} \times \frac{1}{1} = \frac{20.0166667}{1} \][/tex]
So, the fraction simplifies to approximately 20.0166667%. However, since we are looking for the percentage that is just above the threshold of 1000 supporters, we take the exact value of [tex]\(\frac{1001}{6000}\)[/tex] and multiply by 100 to get the percentage:
[tex]\[ \frac{1001}{6000} \times 100 = \frac{1001}{60} \approx 16.6833333 \][/tex]
When an earthquake occurs, energy radiates in all directions from its source. The source is also referred to as the ________. Group of answer choices epicenter
Answer:
C. FOCUS
Explanation:
Focus is the point where the rock starts to fracture. It is referred to as the origin of the the earthquake. Also, known as the hypocenter, vibrating energy from the hypocenter travels in all directions. It's the point where rupture starts.
Epicenter is usually misinterpreted as the focus, but epicenter is actually the point on land that is directly above the focus. It isn't the starting point, but it's the point on the land that's above the starting point.
Which of the following do fossils represent and what do they tell us?
a. extant species that tell the story of human origins
b. extinct organisms that provide a record of the history of life on the planet
c. plants that provide proof of catastrophism
d. organisms that demonstrate the age of the Earth through the process of uniformitarianism
Answer:
b. extinct organisms that provide a record of the history of life on the planet
Explanation:
Fossil are preserved remains or traces of organism that once existed in the past geologic period. These organisms might leave remains of their hard parts like tooth or bones. Discovering these bones or tooth gives more information on the history of past life on the planet earth. Impression left by soft parts like the leaf vein can also be use to provide history of life on earth.
Most fossils are usually remains of extinct organisms, that is organism that once lived in the earth. Organism activities such as burrowing made by small organism can serve as a fossil record too. Studying these traces provide more information of life on earth.
For Fossilization to occur it requires some criteria or condition for it to occur. These includes rapid and permanent burial to avoid loss of the body parts, Lack of oxygen to prevent rapid decay of the organism part and the absence of heat to limit destruction of the body parts.
Answer:erwt
Explanation:terwewtr
According to the theoretical model on the origins of slavery in America, the contact situation- the conditions under which groups first come together- is the single most significant factor in the creation of a minority group status.
Answer:
is the single most significant factor in the creation of a minority group status.
Explanation:
According to the theoretical model of the origins of slavery in America, the English colonies arrived n the point comfort Virginia near the Jamestown that had seized them form the Portuguese ship and the enslaved person was treated property and illegal sold in the market and created a minority group status.In the tropics, the absorbed solar energy is greater than the emitted thermal radiation lost to space. The reverse is true at the poles. What stops the tropics getting hotter and hotter and the poles getting colder and colder?
Answer:
Cyclones and ocean currents transport heat towards the poles
Explanation:
The reason why the tropics is not getting hotter and the poles not getting colder is due to the activities of cyclones and ocean currents which transport heats towards the poles thus enabling the temperatures at the tropics and the poles to remain fairly constant.
Are the current shorelines of South America and Africa accurate representations of those continents when they were rifted apart? What factors other than rifting and seafloor spreading could have modified the shape of the current shorelines?
Answer:
Yes, they were believed to be modified by the formation of the rift valleys and volcanoes activity.
Explanation:
The theory given by the Alfred Wegener provided evidence of the drifting of the continents and the formation of the current shoreline with the respect to the breakup of the super landmass and thus the shorelines of Africa and those of South America are an accurate representation of the breakup and the drift The several factors are accountable for the nature of the coastline that has modified the shape and the size of the continent includes the formation of the rift valleys and the geologic and the tectonic processes and the presence of the faults and the folds in the history of the earth crust.Which of the following is defined as a group of countries committed to removing all barriers to the free flow of goods and services between each other, but pursuing independent external trade policies
Answer:
(FTA) Free trade areas
Explanation:
A free trade areas are those areas or regions that are designed as trade blocs and have signed as a trade and such agreements involves the cooperation between at least two countries to reduce the trade barriers and the imports quotas and the tariffs.An increase the trade and free flow of the services between the member nations and also considered to be an open borderland and are related to the trading agreements and maintain an identical external tariff.It is safe for us to look at all stars except the Sun. When seen from Earth, why does the Sun appear so large and bright that we
must never look directly at it?
-0)
The Sun is closer than other stars.
The Sun is bigger than other stars.
The Sun spins faster than other stars.
D)
The Sun burns hotter than other stars.
Pick the first choice.
The next nearest star, outside our solar system, is more than 63 THOUSAND times as far from us as the Sun is, and ALL the others are farther away than that.
It's like the difference between a flashlight 1 inch from your eye and a flashlight 1 MILE from your eye.
The Sun appears larger and brighter compared to other stars because it is the closest star to Earth. Its extreme brightness can cause eye damage if it is viewed directly. Other stars may be larger or hotter, but because they're much farther away, they appear smaller and less bright.
Explanation:The reason we must never look directly at the Sun is primarily because it is much closer to Earth than any other star. As a result, it appears larger and brighter to us. However, this does not mean that the Sun is the biggest or hottest star in the universe, it's just the closest one to us. Its vast brightness can cause eye damage if observed directly.
It's also important to notice that even though the Sun might seem huge to us, other stars might be even larger or hotter, but because they are extremely far away, they appear as small glowing dots in the night sky.
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In the tropics, the absorbed solar energy is greater than the emitted thermal radiation lost to space. The reverse is true at the poles. What stops the tropics getting hotter and hotter and the poles getting colder and colder?
Answer:
It is called Global atmospheric circulation
Explanation:
Though the earth receives virtually the same amount of energy from the sun but Due to the shape of the earth and some other factors like the surface albedo the tropics absorb more heat energy from the sun than the poles. What stops the tropics getting hotter and hotter or the poles getting colder and colder is the atmospheric circulation. It majorly follows the pattern that cold air from the poles are dense and heavier compared to warm air from the tropics which is warm and light. The great circulation ensures that the dense cold air from the poles moves to the tropics replacing the warm light air which has replaced the cold air at the poles. This cycle is repeated as soon as the new air at the poles becomes cold and the air at the at the tropics becomes warm.
The greenhouse effect prevents the tropics from getting hotter and the poles from getting colder.
Explanation:The relatively constant temperature of the Earth is maintained by the greenhouse effect. In the tropics, where absorbed solar energy is greater than emitted thermal radiation lost to space, greenhouse gases such as carbon dioxide trap the heat and prevent the tropics from getting hotter and hotter. Conversely, at the poles, where emitted thermal radiation is greater than absorbed solar energy, the lack of sunlight prevents the poles from getting colder and colder.
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Teosinte kernels are covered in a hard fruitcase, whereas maize kernels are "naked." What happened when Dr. Doebley's team introduced maize's version of the fruitcase gene into teosinte plants?
Answer:
Teosinte kernels were partially exposed
Explanation:
The teosinte with the maize fruitcase regulatory gene produces seeds that are partway to being maize kernels
Final answer:
Introducing the maize version of the fruitcase gene into teosinte replicated one of the domestication changes, leading to teosinte with more accessible kernels. This genetic manipulation is part of how teosinte was selectively bred into modern maize, showing human impact on plant evolution.
Explanation:
When Dr. Doebley's team introduced maize's version of the fruitcase gene into teosinte plants, they effectively replicated one of the key changes that occurred during the domestication process from teosinte to maize. Teosinte has a hard fruit case that covers its kernels, which posed a challenge for early humans in accessing the edible parts of the plant. Through selective breeding, ancient indigenous peoples in what is now Mexico were able to transform teosinte into maize, which has exposed kernels that are easier to harvest and consume. The ability to manipulate the fruitcase gene, among others, facilitated the development of modern corn with its more desirable agricultural traits, like larger ears and more accessible seeds.
Based on extensive research, it is understood that significant changes in selective breeding and modifications of developmental genes have dramatically altered the physical characteristics of teosinte to produce the maize we are familiar with today. This domestication process is an excellent example of how humans can shape the evolution of plant species to meet their nutritional and agricultural needs.
is a nonfoliated rock formed by contact metamorphism of a shale or mudstone. ________ is a nonfoliated rock formed by contact metamorphism of a shale or mudstone. Schist Marble Hornfels Gneiss
Answer:
Hornfels
Explanation:
Hornfels -
It refers to the category of metamorphic rocks that are heated and hardened by the igneous masses , is referred to as hornfels .
They are finely grained metamorphic rocks .
The temperature required for the formation of these rocks is about 1300 to 1450 degrees Fahrenheit .
These rocks are formed near lava flow , sill etc.
Hence , from the given information of the question ,
The correct answer is hornfels .
Why do we sometimes have earthquakes away from plate boundaries
Answer:
Mantle flow
Explanation:
The mantle is the solid bulk of Earth’s interior which lies between Earth’s dense super-heated core and its thin outer layer, the crust.
The molten magma that surrounds the core was the early mantle.
Water trapped inside minerals erupted with lava through a process called “outgassing.” As more water was outgassed, the mantle solidified.
The rocks that make up Earth’s mantle are mostly silicate. The other major type of rock found in the mantle is magnesium oxide.
The temperature of the mantle varies from 1000°C near the crust, to 3700°C near the core. The viscosity of the mantle also varies.
*** The transfer of heat and material in the mantle helps determine the landscape of Earth. Activities in the mantle drives plate tectonics, contributing to volcanoes, seafloor spreading, earthquakes, and orogeny (mountain-building).
Ocean surface currents transfer about ________ of the total amount of heat from the tropics to the poles. two-thirds one-third one-fourth one-half three-fourths
Answer:
One-Third
Explanation:
What geological feature can be created by a transform boundary
Answer:
Mid ocean ridges and subduction zones :)
Explanation:
the top of the food chain and threatening the health of future generations
Answer:
Humans Are the apex of food chains and the healthy population is made by their interaction.
Explanation:
At the top of the food chain are the meat-eaters as the carnivorous animals and the man and include other wild animals like the polar bears and the orca whales etc. They are considered to be the apex predator and are responsible for the flow of the food chains and thus form an important component of the ecological systems and future is made and influenced by them. They tend to check the balance of the primary and secondary elements of the food chain.The question seems to reference the biological phenomenon of biomagnification. This is the process whereby toxins concentrate in organisms as one ascends the food chain, hence affecting the health of top-level consumers, including humans.
Explanation:The statement appears to refer to the concept of biomagnification in Biology. Biomagnification or bioaccumulation refers to the increasing concentration of a substance, such as a toxic chemical, in the tissues of organisms at successively higher levels in a food chain. For instance, a toxic chemical might be very diluted in water, but small organisms may consume this contaminated water. Through the food chain, these toxins then reach the organisms at higher trophic levels, where they may become concentrated, thus threatening their health. Human beings, being the top consumers, are also at a risk due to this effect.
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What is the difference between the lithosphere and asthenosphere? At what depth does the lithosphere- asthenosphere boundary occur? Is this above or below the Moho? Is the asthenosphere entirely liquid?
Answer:
The difference between the lithosphere and asthenosphere? At what depth does the lithosphere- asthenosphere boundary occur? Is this above or below the Moho? Is the asthenosphere entirely liquid? It lies below the lithosphere, at depths between approximately 80 and 200 km (50 and 120 miles) below the surface. The lithosphere–asthenosphere boundary is usually referred to as LAB. The asthenosphere is almost solid, although some of its regions could be molten
Explanation:
Both the lithosphere and asthenosphere are part of Earth and are made of similar material. Lithosphere is made up of Earth's outermost layer, the crust, and the uppermost portion of the mantle. In comparison, the asthenosphere is the upper portion of Earth's mantle;The lithosphere is everything above the part of the mantle which can flow and the asthenosphere is everything including and below. the lithosphere-asthenosphere boundary occurs at 1280 C approximately at 150 km.
Explanation:
Difference Between the lithosphere and asthenosphere:
Lithosphere is a solid outermost shell of the earth planet and composed of three layers o crust, mantle and core. The viscous and ductile region that lies under the lithosphere is called asthenosphere. So the difference between both of these layers is
" Lithosphere is a solid layer as it composed of rigid materials and the temperature is relatively cool then that of asthenosphere. Asthenosphere composed of viscous melted material and this region has high temperature and pressure."
Depth of lithosphere & asthenosphere boundaries:
The boundary of lithosphere and asthenosphere lies at the depth of about 100 to 150 km.
Above or below the Moho:
Moho lies at the depth of about 35 Km so the boundary of lithosphere and asthenosphere lies below the Moho.
Is the asthenosphere entirely liquid :
Although asthenosphere has a flowing ability but we can not say that its a liquid. Asthenosphere is composed of melted rocks so it lies in the category of solid. Its a viscous melted material. Its not entirely a liquid.
Newborn goslings have an innate tendency to follow the first moving object they see after being hatched. Which researcher observed this behavior that takes place during a critical period for the gosling?
Answer:
Konrad Lorenz was one of the founding fathers of what is now known as ethology
Explanation:
___________ rocks form when existing rocks are subjected to high temperatures and pressures that cause changes in mineralogy and texture but do not melt.
Answer:
Metamorphic
Explanation:
That is the definition of metamorphic rocks
Trenches a. border continental and island volcanic arcs. b. result from seafloor spreading. c. are found at divergent boundaries. d. may be more than 100 km (62 miles) deep.
Answer: A) border continental and island volcanic arcs
Explanation:
Trenches refers to a type of excavation or depression in the ground that is usually deeper than it is wide, and narrow than its length. Trenches border continental and island volcanic arcs.
Trench is a word used in different professions to depicts different things:
Trenches are as a result of erosion caused by rivers or by geological movement of tectonic plates in GEOLOGY.
Trenches are created to install underground infrastructure or utilities or later to access these installations in CIVIL ENGINEERING.
Trenches can also be dug for MILITARY defensive purposes.
The "trench method" is a term used in ARCHAEOLOGY for searching and excavating ancient ruins or to dig into strata of sedimented material.
Identify the true statement. Choose one: A. Charles Lyell correctly explained how fossils form, and he formulated some of the basic principles of relative dating. B. Archbishop James Ussher introduced the principle of uniformitarianism. C. Henri Becquerel discovered principles of radioactivity, which led to the determination of the Earth's age. D. James Hutton, the father of geology, added up generations of patriarchs in the Bible and concluded that the birth date of the Earth was October 23, 4004 B.C.E.
Among the provided statements, the true one is that Henri Becquerel discovered the principles of radioactivity, which eventually lead to the ability to determine the Earth's age.
Explanation:The correct answer is: C.
A brief explanation for the choices: A. While Charles Lyell did play an important role in geology, his insights pertained more to the long time scales involved in geological processes, not specifically how fossils form or principles of relative dating. B. Archbishop James Ussher did not introduce the principle of uniformitarianism, this was done by James Hutton, a Scottish geologist often referred to as the 'Father of Modern Geology'. D. James Hutton is incorrectly attributed in this choice; it was Archbishop Ussher, not Hutton, who did the biblical calculation of Earth’s age.
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Carbon dioxide and particulates are emitted by volcanoes. Particulates form stratospheric aerosols that reflect sunlight. Which of the following best describes the impact of atmospheric carbon dioxide and stratospheric aerosols?
A. Carbon dioxide contributes to global warming, and aerosols cause cooling .
Answer:
i think it would be A but im not realy sure.
Explanation:
Carbon dioxide, a greenhouse gas, traps heat in the atmosphere, contributing to global warming. Conversely, stratospheric aerosols reflect sunlight back into space, creating a cooling effect. These processes do not necessarily cancel each other out as the rates of production and their effects differ.
Explanation:Yes, the description given in the question accurately represents the impact of atmospheric carbon dioxide and stratospheric aerosols, primarily emitted by volcanoes. Carbon dioxide is a greenhouse gas, which means it warms the Earth's surface by trapping heat in the atmosphere, hence contributing to global warming. On the other hand, stratospheric aerosols, formed by particulates, reflect sunlight back into space, thereby causing a cooling effect on the Earth's surface. They partially counteract the warming effect caused by greenhouse gases. However, the warming and the cooling effect do not necessarily equal one out since their natural and human production rates, and effects on the atmosphere and climate, vary significantly.
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In which setting would regional metamorphism be most likely? In which setting would regional metamorphism be most likely? at shallow depths along major transform faults in the continental crust at shallow depths below an oceanic ridge or rift zone at shallow depths beneath the seafloor where water pressures are immense at great depths in the crust where two continents are colliding
Answer:
At a great depths in the crust where two continents are colliding
Explanation:
The regional metamorphism is one that is most likely to occur when the rocks are buried deep inside the earth crust and is most associated with the convergent plate boundary and the formation of the mountain ranges and takes place within the continental slopes and has relatively young sedimentary rocks and occurs at a depth of about 10 to 20 km.Regional metamorphism is most likely to occur at great depths in the crust where two continents are colliding, a scenario that presents the necessary pressure, heat, and deformation for metamorphism.
Explanation:Regional metamorphism is most likely to occur at great depths in the crust where two continents are colliding. This scenario is indicative of a subduction zone, a region where one tectonic plate is forced beneath another. When two continental masses collide, the immense pressure and high temperatures result in metamorphism, the process by which the structure and composition of rocks are changed.
On the other hand, at the boundaries of tectonic plates, specifically, at shallow depths along major transform faults in the continental crust, or at shallow depths beneath an oceanic ridge or rift zone, different geological processes occur rather than regional metamorphism. For example, rift zones - places where plates are moving apart - are characterized by volcanic activity and creation of new crust, but not by metamorphism.
Therefore, the setting of the highest likelihood for regional metamorphism is in areas of continental collision, where rock is subjected to both extreme pressure and significant changes in temperature. This is how many mountain ranges, like the Alps, were formed.
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Suppose you monitor a large number (many thousands) of stars over a period of 3 years, searching for planets through the transit method. Which of the following are necessary for this program to detect an extrasolar planet around one of these stars?
a. You must be able to precisely measure variations in the planet's brightness with time.
b. You must be able to precisely measure variations in the star's brightness with time.
c. As seen from Earth, the planet's orbit must be nearly face-on (perpendicular to our line-of-sight).
d. The planet must have an orbital period of more than about 3 years.
e. As seen from Earth, the planet's orbit must be seen nearly edge-on (in the plane of our line-of-sight).
f. You must repeatedly obtain spectra of the star that the planet orbits.
g. The planet must have an orbital period of less than about 1 year.
h. You must repeatedly obtain the spectra of the planet itself.
Answer:
c) As seen from Earth, the planet's orbit must be seen nearly edge-on (in the plane of our line-of-sight)
a) You must be able to precisely measure variations in the star's brightness with time.
g) The planet must have an orbital period of less than about 1 year.
Explanation:
Answer:
The following are necessary for this program to detect an extrasolar planet around one of these stars:
b. You must be able to precisely measure variations in the star's brightness with time.
e. As seen from Earth, the planet's orbit must be seen nearly edge-on (in the plane of our line-of-sight).
f. You must repeatedly obtain spectra of the star that the planet orbits.
g. The planet must have an orbital period of less than about 1 year.
Explanation:
Although it might be difficult to observe the brightness of a planet, their star's dip in brightness will be used to detect the star. The star brightness reduce by small percentage to signal passing each of extrasolar planet. Spectral of star can be obtained from the planets
Also, using direct imaging from the interferometer, extrasolar planets can be observed nearly edge-on in the plane of our sight.
Each planet must be able to complete some revolutions around to star within the observation time(3 years for this question).
Recall that one hour of right ascension is equal to 15 degrees. One minute of right ascension is equal to 0.25 degrees. During a full moon, the sun and the moon are 180 degrees apart from one another in the sky. How many hours of right ascension separate the sun and moon during a full moon?a) 180 hoursb) 24 hoursc) 12 hoursd) 165 hourse) 6 hoursf) 2 hoursg) 15 hours
Answer:
The right answer is option C
Explanation:
An hour of right ascension is 15 degrees
A minute of right ascension is 15 degrees / 60 minutes = 0.25
For a full moon where the sun and moon are 180 degrees apart. We calculate by finding the number of hours in 180 degrees. Recall there 15 degrees in an hour.
180 degrees / 15 degrees = 12 hours